import json

with open('JSON文件.json', 'r', encoding='utf-8-sig') as f:
    str = f.read()

data = json.loads(str)
print(data)

name_age = data['people']
print(name_age)
target_name = name_age[1]['name']
target_age = name_age[1]['age']

print(target_name + ':' + target_age)
